The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 1986
Filed:
Dec. 17, 1984
Applicant:
Inventors:
Assignee:
NGK Spark Plug Co., Ltd., Aichi, JP;
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501153 ;
Abstract
A high-alumina ceramic composition is described, having a low dielectric loss in the extremely high frequency range, said composition consisting essentially of Al.sub.2 O.sub.3, SiO.sub.2, and MgO, with the Al.sub.2 O.sub.3 content being in the range of from 99.7 to 99.9% and the SiO.sub.2 /MgO weight ratio being in the range of from 1.0/1 to 0.2/1.